Quote Originally Posted by Brimstone111888
I am trying to figure out the genetics of a spider albino, but I am not getting the results with a square. Could someone explain the normal gene to me? Is the normal gene dominant, co-dom, or recessive.

I was thinking it can't be dom or co dom because when it is breed to a dom or co dom the normal looking phenotype goes away, but when you breed recessives to a normal you still get hets and they still have the look of a normal. That has me a bit confused. Maybe someone can help and tell me where I am messing up.

S= Spider
N= Normal
a=Albino

Spider x Albino breeding


S N

a Sa Na

a Sa Na


So I get 50% spiders who are het for albino and normals who are het for albino. This is where I get lost.

Spider het albino x Albino

S a

a Sa aa

a Sa aa

So the result would be 50% Spiders het albino and 50% albinos. Still no Albino spider. I am sure my fault is in my punnet square, but I am not sure where. Thanks for the help!
Normal is Dominate, if it was anything other im pretty sure it wouldnt be considered "Normal"

maybe Co dom morphs are stronger than the Normal gene so is expressed. or its on another loci and is not expressed when another allele is on the loci.

as for the punett i think you need to use a more advanced punett when you are dealing with something like this... like what each sperm/egg can hold in it etc... like the male spider can that is het for albino can produce a few different gametes... SNa is his genotype so he can produce Sa Sn Na sperm
the female can produce only albino eggs. since her genotype is aa

so the punett looks something like this i think

Sa SN Na

a Saa SNa Naa (albino)

a Saa SNa Naa (albino)

im not 100% on all of this since im still learning the more advanced punett squares but your Saa is your spider albino so its looking like 50% albino normal patterns and 50% spider albino

some big smart breeder correct me if i am wrong please